BS ISO 6621-2:2003

Superseded

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Internal combustion engines. Piston rings Inspection measuring principles

Available format(s)

Hardcopy , PDF

Superseded date

04-26-2022

Language(s)

English

Published date

01-07-2004

Publisher

British Standards Institution

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Measuring principles
  4.1 General measuring conditions
  4.2 Ring characteristics and their measurement
      4.2.1 Ring width (in millimetres)
      4.2.2 Radial wall thickness, a[1] (in millimetres)
      4.2.3 Total free gap m, p (in millimetres)
      4.2.4 Closed gap, s[1] (in millimetres)
      4.2.5 Tangential force, F[t] (in newtons)
      4.2.6 Diametral force, F[d] (in newtons)
      4.2.7 Ovality, U (in millimetres)
      4.2.8 Point deflection, W (in millimeters)
      4.2.9 Light tightness (percentage of ring circumference)
      4.2.10 Taper on peripheral surface (in micrometres or
             degrees)
      4.2.11 Barrel on peripheral surface, t[2], t[3]
             (in millimetres)
      4.2.12 Land width, h[4], h[5] (in millimetres)
      4.2.13 Land offset (in millimetres)
      4.2.14 Plating/coating thickness (in millimetres)
      4.2.15 Nitrided case depth (in millimetres)
      4.2.16 Keystone angle (in degrees)
      4.2.17 Obliqueness (in degrees)
      4.2.18 Twist (in millimetres)
      4.2.19 Unevenness T[er], T[eu]
      4.2.20 Helix (axial displacement of gap ends)
             (in millimetres)
      4.2.21 Free flatness (in millimetres)
      4.2.22 Surface roughness Ra, Rz (in micrometres)
Bibliography

Describes the principles to be used in the measuring for inspection purposes of piston rings for both reciprocating internal combustion engines and compressors working under analogous conditions. Applicable to all such rings of a diameter greater than or equal to 200 mm.

Committee	MCE/22
DevelopmentNote	Supersedes BS 5341-6.2(1992) (01/2004) Supersedes 99/710393 DC (03/2004)
DocumentType	Standard
Pages	38
PublisherName	British Standards Institution
Status	Superseded
SupersededBy	BS ISO 6621-2:2020
Supersedes	99/710393 DC : DRAFT JULY 1999 BS 5341-6.2:1992

Standards	Relationship
ISO 6621-2:2003	Identical

ISO 6622-2:2013	Internal combustion engines — Piston rings — Part 2: Rectangular rings made of steel
ISO 4287:1997	Geometrical Product Specifications (GPS) — Surface texture: Profile method — Terms, definitions and surface texture parameters
ISO 6624-3:2017	Internal combustion engines — Piston rings — Part 3: Keystone rings made of steel
ISO 6626-2:2013	Internal combustion engines Piston rings Part 2: Coil-spring-loaded oil control rings of narrow width made of cast iron
ISO 6624-1:2017	Internal combustion engines — Piston rings — Part 1: Keystone rings made of cast iron
ISO 1101:2017	Geometrical product specifications (GPS) — Geometrical tolerancing — Tolerances of form, orientation, location and run-out
ISO 6624-4:2016	Internal combustion engines — Piston rings — Part 4: Half keystone rings made of steel
ISO 6507-3:2005	Metallic materials Vickers hardness test Part 3: Calibration of reference blocks
ISO 6625:1986	Internal combustion engines Piston rings Oil control rings
ISO 6622-1:2003	Internal combustion engines Piston rings Part 1: Rectangular rings made of cast iron
ISO 6623:2013	Internal combustion engines Piston rings Scraper rings made of cast iron
ISO 6626:1989	Internal combustion engines Piston rings Coil-spring-loaded oil control rings
ISO 1302:2002	Geometrical Product Specifications (GPS) Indication of surface texture in technical product documentation
ISO/TR 6624-2:1988	Internal combustion engines — Piston rings — Part 2: Half keystone rings
ISO 468:1982	Surface roughness — Parameters, their values and general rules for specifying requirements
ISO 6627:2011	Internal combustion engines Piston rings Expander/segment oil-control rings
ISO 6621-1:2007	Internal combustion engines Piston rings Part 1: Vocabulary
ISO 4287-1:1984	Surface roughness — Terminology — Part 1: Surface and its parameters

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BS ISO 6621-2:2003

Superseded

Table of Contents

Abstract

General Product Information

International Equivalents

Standards Referencing This Book

Category

Subcategory

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